func TestDeepEqual(t *testing.T) {
cases := []struct {
a, b interface{}
equal bool
}{
{"a", "a", true},
{"a", "b", false},
{"a", aws.String(""), false},
{"a", nil, false},
{"a", aws.String("a"), true},
{(*bool)(nil), (*bool)(nil), true},
{(*bool)(nil), (*string)(nil), false},
{nil, nil, true},
}
for i, c := range cases {
assert.Equal(t, c.equal, awsutil.DeepEqual(c.a, c.b), "%d, a:%v b:%v, %t", i, c.a, c.b, c.equal)
}
}
// Wait waits for an operation to complete, expire max attempts, or fail. Error
// is returned if the operation fails.
func (w *Waiter) Wait() error {
client := reflect.ValueOf(w.Client)
in := reflect.ValueOf(w.Input)
method := client.MethodByName(w.Config.Operation + "Request")
for i := 0; i < w.MaxAttempts; i++ {
res := method.Call([]reflect.Value{in})
req := res[0].Interface().(*request.Request)
req.Handlers.Build.PushBack(request.MakeAddToUserAgentFreeFormHandler("Waiter"))
err := req.Send()
for _, a := range w.Acceptors {
if err != nil && a.Matcher != "error" {
// Only matcher error is valid if there is a request error
continue
}
result := false
var vals []interface{}
switch a.Matcher {
case "pathAll", "path":
// Require all matches to be equal for result to match
vals, _ = awsutil.ValuesAtPath(req.Data, a.Argument)
result = true
for _, val := range vals {
if !awsutil.DeepEqual(val, a.Expected) {
result = false
break
}
}
case "pathAny":
// Only a single match needs to equal for the result to match
vals, _ = awsutil.ValuesAtPath(req.Data, a.Argument)
for _, val := range vals {
if awsutil.DeepEqual(val, a.Expected) {
result = true
break
}
}
case "status":
s := a.Expected.(int)
result = s == req.HTTPResponse.StatusCode
case "error":
if aerr, ok := err.(awserr.Error); ok {
result = aerr.Code() == a.Expected.(string)
}
case "pathList":
// ignored matcher
default:
logf(client, "WARNING: Waiter for %s encountered unexpected matcher: %s",
w.Config.Operation, a.Matcher)
}
if !result {
// If there was no matching result found there is nothing more to do
// for this response, retry the request.
continue
}
switch a.State {
case "success":
// waiter completed
return nil
case "failure":
// Waiter failure state triggered
return awserr.New("ResourceNotReady",
fmt.Sprintf("failed waiting for successful resource state"), err)
case "retry":
// clear the error and retry the operation
err = nil
default:
logf(client, "WARNING: Waiter for %s encountered unexpected state: %s",
w.Config.Operation, a.State)
}
}
if err != nil {
return err
}
time.Sleep(time.Second * time.Duration(w.Delay))
}
return awserr.New("ResourceNotReady",
fmt.Sprintf("exceeded %d wait attempts", w.MaxAttempts), nil)
}